Drill bit adapter



FIG. 1 is a perspective view of a drill bit adapter according to a first embodiment of the claimed design;

FIG. 2 is a right elevation view of the drill bit adapter of FIG. 1;

FIG. 3 is a left elevation view of the drill bit adapter of FIG. 1;

FIG. 4 is a front elevation view of the drill bit adapter of FIG. 1;

FIG. 5 is a rear elevation view of the drill bit adapter of FIG. 1;

FIG. 6 is a top plan view of the drill bit adapter of FIG. 1;

FIG. 7 is a bottom plan view of the drill bit adapter of FIG. 1;

FIG. 8 is a perspective view of a drill bit adapter according to a second embodiment of the claimed design;

FIG. 9 is a right elevation view of the drill bit adapter of FIG. 8;

FIG. 10 is a left elevation view of the drill bit adapter of FIG. 8;

FIG. 11 is a front elevation view of the drill bit adapter of FIG. 8;

FIG. 12 is a rear elevation view of the drill bit adapter of FIG. 8;

FIG. 13 is a top plan view of the drill bit adapter of FIG. 8;

FIG. 14 is a bottom plan view of the drill bit adapter of FIG. 8;

FIG. 15 is a perspective view of a drill bit adapter according to a third embodiment of the claimed design;

FIG. 16 is a right elevation view of the drill bit adapter of FIG. 15;

FIG. 17 is a left elevation view of the drill bit adapter of FIG. 15;

FIG. 18 is a front elevation view of the drill bit adapter of FIG. 15;

FIG. 19 is a rear elevation view of the drill bit adapter of FIG. 15;

FIG. 20 is a top plan view of the drill bit adapter of FIG. 15; and,

FIG. 21 is a bottom plan view of the drill bit adapter of FIG. 15.

The broken lines show portions of a drill bit adapter which from no part of the claimed design. 

CLAIM The ornamental design for a drill bit adapter, as shown and described. 